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source: palm/trunk/SOURCE/time_integration.f90 @ 2629

Last change on this file since 2629 was 2617, checked in by suehring, 7 years ago
Avoid that the mean reference state in buoyancy term does not become zero
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1	!> @file time_integration.f90
2	!------------------------------------------------------------------------------!
3	! This file is part of PALM.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the
6	! terms of the GNU General Public License as published by the Free Software
7	! Foundation, either version 3 of the License, or (at your option) any later
8	! version.
9	!
10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13	!
14	! You should have received a copy of the GNU General Public License along with
15	! PALM. If not, see <http://www.gnu.org/licenses/>.
16	!
17	! Copyright 1997-2017 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: time_integration.f90 2617 2017-11-16 12:47:24Z schwenkel $
27	! Bugfix, assure that the reference state does not become zero.
28	!
29	! 2563 2017-10-19 15:36:10Z Giersch
30	! Variable wind_turbine moved to module control_parameters
31	!
32	! 2365 2017-08-21 14:59:59Z kanani
33	! Vertical grid nesting implemented (SadiqHuq)
34	!
35	! 2320 2017-07-21 12:47:43Z suehring
36	! Set bottom boundary conditions after nesting interpolation and anterpolation
37	!
38	! 2299 2017-06-29 10:14:38Z maronga
39	! Call of soil model adjusted
40	!
41	! 2292 2017-06-20 09:51:42Z schwenkel
42	! Implementation of new microphysic scheme: cloud_scheme = 'morrison'
43	! includes two more prognostic equations for cloud drop concentration (nc)
44	! and cloud water content (qc).
45	!
46	! 2271 2017-06-09 12:34:55Z sward
47	! Start timestep message changed
48	!
49	! 2259 2017-06-08 09:09:11Z gronemeier
50	! Implemented synthetic turbulence generator
51	!
52	! 2233 2017-05-30 18:08:54Z suehring
53	!
54	! 2232 2017-05-30 17:47:52Z suehring
55	! Adjustments to new topography and surface concept
56	! Modify passed parameters for disturb_field
57	!
58	! 2178 2017-03-17 11:07:39Z hellstea
59	! Setting perturbations at all times near inflow boundary is removed
60	! in case of nested boundaries
61	!
62	! 2174 2017-03-13 08:18:57Z maronga
63	! Added support for nesting with cloud microphysics
64	!
65	! 2118 2017-01-17 16:38:49Z raasch
66	! OpenACC directives and related code removed
67	!
68	! 2050 2016-11-08 15:00:55Z gronemeier
69	! Implement turbulent outflow condition
70	!
71	! 2031 2016-10-21 15:11:58Z knoop
72	! renamed variable rho to rho_ocean
73	!
74	! 2011 2016-09-19 17:29:57Z kanani
75	! Flag urban_surface is now defined in module control_parameters,
76	! removed commented CALLs of global_min_max.
77	!
78	! 2007 2016-08-24 15:47:17Z kanani
79	! Added CALLs for new urban surface model
80	!
81	! 2000 2016-08-20 18:09:15Z knoop
82	! Forced header and separation lines into 80 columns
83	!
84	! 1976 2016-07-27 13:28:04Z maronga
85	! Simplified calls to radiation model
86	!
87	! 1960 2016-07-12 16:34:24Z suehring
88	! Separate humidity and passive scalar
89	!
90	! 1957 2016-07-07 10:43:48Z suehring
91	! flight module added
92	!
93	! 1919 2016-05-27 14:51:23Z raasch
94	! Initial version of purely vertical nesting introduced.
95	!
96	! 1918 2016-05-27 14:35:57Z raasch
97	! determination of time step moved to the end of the time step loop,
98	! the first time step is now always calculated before the time step loop (i.e.
99	! also in case of restart runs)
100	!
101	! 1914 2016-05-26 14:44:07Z witha
102	! Added call for wind turbine model
103	!
104	! 1878 2016-04-19 12:30:36Z hellstea
105	! Synchronization for nested runs rewritten
106	!
107	! 1853 2016-04-11 09:00:35Z maronga
108	! Adjusted for use with radiation_scheme = constant
109	!
110	! 1849 2016-04-08 11:33:18Z hoffmann
111	! Adapted for modularization of microphysics
112	!
113	! 1833 2016-04-07 14:23:03Z raasch
114	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
115	!
116	! 1831 2016-04-07 13:15:51Z hoffmann
117	! turbulence renamed collision_turbulence
118	!
119	! 1822 2016-04-07 07:49:42Z hoffmann
120	! icloud_scheme replaced by microphysics_*
121	!
122	! 1808 2016-04-05 19:44:00Z raasch
123	! output message in case unscheduled radiation calls removed
124	!
125	! 1797 2016-03-21 16:50:28Z raasch
126	! introduction of different datatransfer modes
127	!
128	! 1791 2016-03-11 10:41:25Z raasch
129	! call of pmci_update_new removed
130	!
131	! 1786 2016-03-08 05:49:27Z raasch
132	! +module spectrum
133	!
134	! 1783 2016-03-06 18:36:17Z raasch
135	! switch back of netcdf data format for mask output moved to the mask output
136	! routine
137	!
138	! 1781 2016-03-03 15:12:23Z raasch
139	! some pmc calls removed at the beginning (before timeloop),
140	! pmc initialization moved to the main program
141	!
142	! 1764 2016-02-28 12:45:19Z raasch
143	! PMC_ACTIVE flags removed,
144	! bugfix: nest synchronization after first call of timestep
145	!
146	! 1762 2016-02-25 12:31:13Z hellstea
147	! Introduction of nested domain feature
148	!
149	! 1736 2015-12-04 08:56:33Z raasch
150	! no perturbations added to total domain if energy limit has been set zero
151	!
152	! 1691 2015-10-26 16:17:44Z maronga
153	! Added option for spin-ups without land surface and radiation models. Moved calls
154	! for radiation and lan surface schemes.
155	!
156	! 1682 2015-10-07 23:56:08Z knoop
157	! Code annotations made doxygen readable
158	!
159	! 1671 2015-09-25 03:29:37Z raasch
160	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
161	! for particles
162	!
163	! 1585 2015-04-30 07:05:52Z maronga
164	! Moved call of radiation scheme. Added support for RRTM
165	!
166	! 1551 2015-03-03 14:18:16Z maronga
167	! Added interface for different radiation schemes.
168	!
169	! 1496 2014-12-02 17:25:50Z maronga
170	! Added calls for the land surface model and radiation scheme
171	!
172	! 1402 2014-05-09 14:25:13Z raasch
173	! location messages modified
174	!
175	! 1384 2014-05-02 14:31:06Z raasch
176	! location messages added
177	!
178	! 1380 2014-04-28 12:40:45Z heinze
179	! CALL of nudge_ref added
180	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
181	!
182	! 1365 2014-04-22 15:03:56Z boeske
183	! Reset sums_ls_l to zero at each timestep
184	! +sums_ls_l
185	! Calculation of reference state (previously in subroutine calc_mean_profile)
186
187	! 1342 2014-03-26 17:04:47Z kanani
188	! REAL constants defined as wp-kind
189	!
190	! 1320 2014-03-20 08:40:49Z raasch
191	! ONLY-attribute added to USE-statements,
192	! kind-parameters added to all INTEGER and REAL declaration statements,
193	! kinds are defined in new module kinds,
194	! old module precision_kind is removed,
195	! revision history before 2012 removed,
196	! comment fields (!:) to be used for variable explanations added to
197	! all variable declaration statements
198	! 1318 2014-03-17 13:35:16Z raasch
199	! module interfaces removed
200	!
201	! 1308 2014-03-13 14:58:42Z fricke
202	! +netcdf_data_format_save
203	! For masked data, parallel netcdf output is not tested so far, hence
204	! netcdf_data_format is switched back to non-paralell output.
205	!
206	! 1276 2014-01-15 13:40:41Z heinze
207	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
208	!
209	! 1257 2013-11-08 15:18:40Z raasch
210	! acc-update-host directive for timestep removed
211	!
212	! 1241 2013-10-30 11:36:58Z heinze
213	! Generalize calc_mean_profile for wider use
214	! Determine shf and qsws in dependence on data from LSF_DATA
215	! Determine ug and vg in dependence on data from LSF_DATA
216	! 1221 2013-09-10 08:59:13Z raasch
217	! host update of arrays before timestep is called
218	!
219	! 1179 2013-06-14 05:57:58Z raasch
220	! mean profiles for reference state are only calculated if required,
221	! small bugfix for background communication
222	!
223	! 1171 2013-05-30 11:27:45Z raasch
224	! split of prognostic_equations deactivated (comment lines), for the time being
225	!
226	! 1128 2013-04-12 06:19:32Z raasch
227	! asynchronous transfer of ghost point data realized for acc-optimized version:
228	! prognostic_equations are first called two times for those points required for
229	! the left-right and north-south exchange, respectively, and then for the
230	! remaining points,
231	! those parts requiring global communication moved from prognostic_equations to
232	! here
233	!
234	! 1115 2013-03-26 18:16:16Z hoffmann
235	! calculation of qr and nr is restricted to precipitation
236	!
237	! 1113 2013-03-10 02:48:14Z raasch
238	! GPU-porting of boundary conditions,
239	! openACC directives updated
240	! formal parameter removed from routine boundary_conds
241	!
242	! 1111 2013-03-08 23:54:10Z raasch
243	! +internal timestep counter for cpu statistics added,
244	! openACC directives updated
245	!
246	! 1092 2013-02-02 11:24:22Z raasch
247	! unused variables removed
248	!
249	! 1065 2012-11-22 17:42:36Z hoffmann
250	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
251	!
252	! 1053 2012-11-13 17:11:03Z hoffmann
253	! exchange of ghost points for nr, qr added
254	!
255	! 1036 2012-10-22 13:43:42Z raasch
256	! code put under GPL (PALM 3.9)
257	!
258	! 1019 2012-09-28 06:46:45Z raasch
259	! non-optimized version of prognostic_equations removed
260	!
261	! 1015 2012-09-27 09:23:24Z raasch
262	! +call of prognostic_equations_acc
263	!
264	! 1001 2012-09-13 14:08:46Z raasch
265	! all actions concerning leapfrog- and upstream-spline-scheme removed
266	!
267	! 849 2012-03-15 10:35:09Z raasch
268	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
269	!
270	! 825 2012-02-19 03:03:44Z raasch
271	! wang_collision_kernel renamed wang_kernel
272	!
273	! Revision 1.1 1997/08/11 06:19:04 raasch
274	! Initial revision
275	!
276	!
277	! Description:
278	! ------------
279	!> Integration in time of the model equations, statistical analysis and graphic
280	!> output
281	!------------------------------------------------------------------------------!
282	SUBROUTINE time_integration
283
284
285	USE advec_ws, &
286	ONLY: ws_statistics
287
288	USE arrays_3d, &
289	ONLY: diss, dzu, e, e_p, nc, nc_p, nr, nr_p, prho, pt, pt_p, pt_init, &
290	q_init, q, qc, qc_p, ql, ql_c, ql_v, ql_vp, qr, qr_p, q_p, &
291	ref_state, rho_ocean, s, s_p, sa_p, tend, u, u_p, v, vpt, &
292	v_p, w, w_p
293
294	USE calc_mean_profile_mod, &
295	ONLY: calc_mean_profile
296
297	USE control_parameters, &
298	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
299	averaging_interval, averaging_interval_pr, &
300	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
301	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
302	cloud_physics, constant_flux_layer, constant_heatflux, &
303	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
304	coupling_start_time, current_timestep_number, &
305	disturbance_created, disturbance_energy_limit, dist_range, &
306	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
307	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
308	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
309	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
310	end_time, first_call_lpm, galilei_transformation, humidity, &
311	intermediate_timestep_count, intermediate_timestep_count_max, &
312	land_surface, large_scale_forcing, &
313	loop_optimization, lsf_surf, lsf_vert, masks, &
314	microphysics_morrison, microphysics_seifert, mid, nest_domain, &
315	neutral, nr_timesteps_this_run, nudging, &
316	ocean, passive_scalar, &
317	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
318	run_coupled, simulated_time, simulated_time_chr, &
319	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
320	skip_time_do3d, skip_time_domask, skip_time_dopr, &
321	skip_time_data_output_av, sloping_surface, &
322	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
323	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
324	time_do3d, time_domask, time_dopr, time_dopr_av, &
325	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
326	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
327	time_run_control, time_since_reference_point, &
328	turbulent_inflow, turbulent_outflow, urban_surface, &
329	use_initial_profile_as_reference, &
330	use_single_reference_value, u_gtrans, v_gtrans, virtual_flight, &
331	wind_turbine, ws_scheme_mom, ws_scheme_sca
332
333	USE cpulog, &
334	ONLY: cpu_log, log_point, log_point_s
335
336	USE flight_mod, &
337	ONLY: flight_measurement
338
339
340	USE indices, &
341	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzt
342
343	USE interaction_droplets_ptq_mod, &
344	ONLY: interaction_droplets_ptq
345
346	USE interfaces
347
348	USE kinds
349
350	USE land_surface_model_mod, &
351	ONLY: lsm_energy_balance, lsm_soil_model, &
352	skip_time_do_lsm
353
354	USE lsf_nudging_mod, &
355	ONLY: calc_tnudge, ls_forcing_surf, ls_forcing_vert, nudge_ref
356
357	USE microphysics_mod, &
358	ONLY: collision_turbulence
359
360	USE particle_attributes, &
361	ONLY: particle_advection, particle_advection_start, &
362	use_sgs_for_particles, wang_kernel
363
364	USE pegrid
365
366	USE pmc_interface, &
367	ONLY: nested_run, nesting_mode, pmci_boundary_conds, pmci_datatrans, &
368	pmci_ensure_nest_mass_conservation, pmci_synchronize
369
370	USE production_e_mod, &
371	ONLY: production_e_init
372
373	USE progress_bar, &
374	ONLY: finish_progress_bar, output_progress_bar
375
376	USE prognostic_equations_mod, &
377	ONLY: prognostic_equations_cache, prognostic_equations_vector
378
379	USE radiation_model_mod, &
380	ONLY: dt_radiation, force_radiation_call, radiation, radiation_control,&
381	skip_time_do_radiation, time_radiation
382
383	USE spectra_mod, &
384	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
385	skip_time_dosp
386
387	USE statistics, &
388	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l, u_max, &
389	u_max_ijk, v_max, v_max_ijk, w_max, w_max_ijk
390
391	USE surface_layer_fluxes_mod, &
392	ONLY: surface_layer_fluxes
393
394	USE surface_mod, &
395	ONLY: surf_def_h, surf_lsm_h, surf_usm_h
396
397	USE urban_surface_mod, &
398	ONLY: usm_material_heat_model, usm_material_model, &
399	usm_radiation, usm_surface_energy_balance
400
401	USE synthetic_turbulence_generator_mod, &
402	ONLY: stg_main, use_synthetic_turbulence_generator
403
404	USE user_actions_mod, &
405	ONLY: user_actions
406
407	USE wind_turbine_model_mod, &
408	ONLY: wtm_forces
409
410	USE vertical_nesting_mod, &
411	ONLY: vnested, vnest_anterpolate, vnest_anterpolate_e, &
412	vnest_boundary_conds, vnest_boundary_conds_khkm, &
413	vnest_deallocate, vnest_init, vnest_init_fine, &
414	vnest_start_time
415
416	IMPLICIT NONE
417
418	CHARACTER (LEN=9) :: time_to_string !<
419
420	REAL(wp) :: dt_3d_old !< temporary storage of timestep to be used for
421	!< steering of run control output interval
422
423	!
424	!-- At beginning determine the first time step
425	CALL timestep
426
427	!
428	!-- Synchronize the timestep in case of nested run.
429	IF ( nested_run ) THEN
430	!
431	!-- Synchronization by unifying the time step.
432	!-- Global minimum of all time-steps is used for all.
433	CALL pmci_synchronize
434	ENDIF
435
436	!
437	!-- Determine and print out the run control quantities before the first time
438	!-- step of this run. For the initial run, some statistics (e.g. divergence)
439	!-- need to be determined first.
440	IF ( simulated_time == 0.0_wp ) CALL flow_statistics
441	CALL run_control
442
443	!
444	!-- Data exchange between coupled models in case that a call has been omitted
445	!-- at the end of the previous run of a job chain.
446	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled .AND. .NOT. vnested) THEN
447	!
448	!-- In case of model termination initiated by the local model the coupler
449	!-- must not be called because this would again cause an MPI hang.
450	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
451	CALL surface_coupler
452	time_coupling = time_coupling - dt_coupling
453	ENDDO
454	IF (time_coupling == 0.0_wp .AND. &
455	time_since_reference_point < dt_coupling ) &
456	THEN
457	time_coupling = time_since_reference_point
458	ENDIF
459	ENDIF
460
461	#if defined( __dvrp_graphics )
462	!
463	!-- Time measurement with dvrp software
464	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
465	#endif
466
467	CALL location_message( 'starting timestep-sequence', .TRUE. )
468	!
469	!-- Start of the time loop
470	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
471	.NOT. terminate_run )
472
473	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
474	!
475	!-- Vertical nesting: initialize fine grid
476	IF ( vnested ) THEN
477	IF ( .NOT. vnest_init .AND. simulated_time >= vnest_start_time ) THEN
478	CALL cpu_log( log_point(80), 'vnest_init', 'start' )
479	CALL vnest_init_fine
480	vnest_init = .TRUE.
481	CALL cpu_log( log_point(80), 'vnest_init', 'stop' )
482	ENDIF
483	ENDIF
484	!
485	!-- Determine ug, vg and w_subs in dependence on data from external file
486	!-- LSF_DATA
487	IF ( large_scale_forcing .AND. lsf_vert ) THEN
488	CALL ls_forcing_vert ( simulated_time )
489	sums_ls_l = 0.0_wp
490	ENDIF
491
492	!
493	!-- Set pt_init and q_init to the current profiles taken from
494	!-- NUDGING_DATA
495	IF ( nudging ) THEN
496	CALL nudge_ref ( simulated_time )
497	!
498	!-- Store temperature gradient at the top boundary for possible Neumann
499	!-- boundary condition
500	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
501	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
502	ENDIF
503
504	!
505	!-- Execute the user-defined actions
506	CALL user_actions( 'before_timestep' )
507
508	!
509	!-- Calculate forces by wind turbines
510	IF ( wind_turbine ) THEN
511
512	CALL cpu_log( log_point(55), 'wind_turbine', 'start' )
513
514	CALL wtm_forces
515
516	CALL cpu_log( log_point(55), 'wind_turbine', 'stop' )
517
518	ENDIF
519
520	!
521	!-- Start of intermediate step loop
522	intermediate_timestep_count = 0
523	DO WHILE ( intermediate_timestep_count < &
524	intermediate_timestep_count_max )
525
526	intermediate_timestep_count = intermediate_timestep_count + 1
527
528	!
529	!-- Set the steering factors for the prognostic equations which depend
530	!-- on the timestep scheme
531	CALL timestep_scheme_steering
532
533	!
534	!-- Calculate those variables needed in the tendency terms which need
535	!-- global communication
536	IF ( .NOT. use_single_reference_value .AND. &
537	.NOT. use_initial_profile_as_reference ) THEN
538	!
539	!-- Horizontally averaged profiles to be used as reference state in
540	!-- buoyancy terms (WARNING: only the respective last call of
541	!-- calc_mean_profile defines the reference state!)
542	IF ( .NOT. neutral ) THEN
543	CALL calc_mean_profile( pt, 4 )
544	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
545	ENDIF
546	IF ( ocean ) THEN
547	CALL calc_mean_profile( rho_ocean, 64 )
548	ref_state(:) = hom(:,1,64,0)
549	ENDIF
550	IF ( humidity ) THEN
551	CALL calc_mean_profile( vpt, 44 )
552	ref_state(:) = hom(:,1,44,0)
553	ENDIF
554	!
555	!-- Assure that ref_state does not become zero at any level
556	!-- ( might be the case if a vertical level is completely occupied
557	!-- with topography ).
558	ref_state = MERGE( MAXVAL(ref_state), ref_state, &
559	ref_state == 0.0_wp )
560	ENDIF
561
562	IF ( .NOT. constant_diffusion ) CALL production_e_init
563	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
564	intermediate_timestep_count == 1 ) CALL ws_statistics
565	!
566	!-- In case of nudging calculate current nudging time scale and horizontal
567	!-- means of u, v, pt and q
568	IF ( nudging ) THEN
569	CALL calc_tnudge( simulated_time )
570	CALL calc_mean_profile( u, 1 )
571	CALL calc_mean_profile( v, 2 )
572	CALL calc_mean_profile( pt, 4 )
573	CALL calc_mean_profile( q, 41 )
574	ENDIF
575
576	!
577	!-- Solve the prognostic equations. A fast cache optimized version with
578	!-- only one single loop is used in case of Piascek-Williams advection
579	!-- scheme. NEC vector machines use a different version, because
580	!-- in the other versions a good vectorization is prohibited due to
581	!-- inlining problems.
582	IF ( loop_optimization == 'cache' ) THEN
583	CALL prognostic_equations_cache
584	ELSEIF ( loop_optimization == 'vector' ) THEN
585	CALL prognostic_equations_vector
586	ENDIF
587
588	!
589	!-- Particle transport/physics with the Lagrangian particle model
590	!-- (only once during intermediate steps, because it uses an Euler-step)
591	!-- ### particle model should be moved before prognostic_equations, in order
592	!-- to regard droplet interactions directly
593	IF ( particle_advection .AND. &
594	simulated_time >= particle_advection_start .AND. &
595	intermediate_timestep_count == 1 ) THEN
596	CALL lpm
597	first_call_lpm = .FALSE.
598	ENDIF
599
600	!
601	!-- Interaction of droplets with temperature and specific humidity.
602	!-- Droplet condensation and evaporation is calculated within
603	!-- advec_particles.
604	IF ( cloud_droplets .AND. &
605	intermediate_timestep_count == intermediate_timestep_count_max )&
606	THEN
607	CALL interaction_droplets_ptq
608	ENDIF
609
610	!
611	!-- Exchange of ghost points (lateral boundary conditions)
612	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
613
614	CALL exchange_horiz( u_p, nbgp )
615	CALL exchange_horiz( v_p, nbgp )
616	CALL exchange_horiz( w_p, nbgp )
617	CALL exchange_horiz( pt_p, nbgp )
618	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
619	IF ( ocean ) THEN
620	CALL exchange_horiz( sa_p, nbgp )
621	CALL exchange_horiz( rho_ocean, nbgp )
622	CALL exchange_horiz( prho, nbgp )
623	ENDIF
624	IF ( humidity ) THEN
625	CALL exchange_horiz( q_p, nbgp )
626	IF ( cloud_physics .AND. microphysics_morrison ) THEN
627	CALL exchange_horiz( qc_p, nbgp )
628	CALL exchange_horiz( nc_p, nbgp )
629	ENDIF
630	IF ( cloud_physics .AND. microphysics_seifert ) THEN
631	CALL exchange_horiz( qr_p, nbgp )
632	CALL exchange_horiz( nr_p, nbgp )
633	ENDIF
634	ENDIF
635	IF ( cloud_droplets ) THEN
636	CALL exchange_horiz( ql, nbgp )
637	CALL exchange_horiz( ql_c, nbgp )
638	CALL exchange_horiz( ql_v, nbgp )
639	CALL exchange_horiz( ql_vp, nbgp )
640	ENDIF
641	IF ( wang_kernel .OR. collision_turbulence .OR. &
642	use_sgs_for_particles ) THEN
643	CALL exchange_horiz( diss, nbgp )
644	ENDIF
645	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
646
647	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
648
649	!
650	!-- Boundary conditions for the prognostic quantities (except of the
651	!-- velocities at the outflow in case of a non-cyclic lateral wall)
652	CALL boundary_conds
653	!
654	!-- Swap the time levels in preparation for the next time step.
655	CALL swap_timelevel
656
657	!
658	!-- Vertical nesting: Interpolate fine grid data to the coarse grid
659	IF ( vnest_init ) THEN
660	CALL cpu_log( log_point(81), 'vnest_anterpolate', 'start' )
661	CALL vnest_anterpolate
662	CALL cpu_log( log_point(81), 'vnest_anterpolate', 'stop' )
663	ENDIF
664
665	IF ( nested_run ) THEN
666
667	CALL cpu_log( log_point(60), 'nesting', 'start' )
668	!
669	!-- Domain nesting. The data transfer subroutines pmci_parent_datatrans
670	!-- and pmci_child_datatrans are called inside the wrapper
671	!-- subroutine pmci_datatrans according to the control parameters
672	!-- nesting_mode and nesting_datatransfer_mode.
673	!-- TO_DO: why is nesting_mode given as a parameter here?
674	CALL pmci_datatrans( nesting_mode )
675
676	IF ( TRIM( nesting_mode ) == 'two-way' .OR. &
677	nesting_mode == 'vertical' ) THEN
678	!
679	!-- Exchange_horiz is needed for all parent-domains after the
680	!-- anterpolation
681	CALL exchange_horiz( u, nbgp )
682	CALL exchange_horiz( v, nbgp )
683	CALL exchange_horiz( w, nbgp )
684	IF ( .NOT. neutral ) CALL exchange_horiz( pt, nbgp )
685
686	IF ( humidity ) THEN
687
688	CALL exchange_horiz( q, nbgp )
689
690	IF ( cloud_physics .AND. microphysics_morrison ) THEN
691	CALL exchange_horiz( qc, nbgp )
692	CALL exchange_horiz( nc, nbgp )
693	ENDIF
694	IF ( cloud_physics .AND. microphysics_seifert ) THEN
695	CALL exchange_horiz( qr, nbgp )
696	CALL exchange_horiz( nr, nbgp )
697	ENDIF
698
699	ENDIF
700
701	IF ( passive_scalar ) CALL exchange_horiz( s, nbgp )
702	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
703	ENDIF
704	!
705	!-- Set boundary conditions again after interpolation and anterpolation.
706	CALL pmci_boundary_conds
707	!
708	!-- Correct the w top-BC in nest domains to ensure mass conservation.
709	!-- This action must never be done for the root domain. Vertical
710	!-- nesting implies mass conservation.
711	IF ( nest_domain ) THEN
712	CALL pmci_ensure_nest_mass_conservation
713	ENDIF
714
715	CALL cpu_log( log_point(60), 'nesting', 'stop' )
716
717	ENDIF
718
719	!
720	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
721	!-- when a sloping surface is used
722	IF ( sloping_surface ) THEN
723	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
724	pt_slope_offset
725	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
726	pt_slope_offset
727	ENDIF
728
729	!
730	!-- Impose a turbulent inflow using the recycling method
731	IF ( turbulent_inflow ) CALL inflow_turbulence
732
733	!
734	!-- Impose a turbulent inflow using synthetic generated turbulence
735	IF ( use_synthetic_turbulence_generator ) THEN
736	CALL stg_main
737	ENDIF
738
739	!
740	!-- Set values at outflow boundary using the special outflow condition
741	IF ( turbulent_outflow ) CALL outflow_turbulence
742
743	!
744	!-- Impose a random perturbation on the horizontal velocity field
745	IF ( create_disturbances .AND. &
746	( call_psolver_at_all_substeps .AND. &
747	intermediate_timestep_count == intermediate_timestep_count_max )&
748	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
749	intermediate_timestep_count == 1 ) ) &
750	THEN
751	time_disturb = time_disturb + dt_3d
752	IF ( time_disturb >= dt_disturb ) THEN
753	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
754	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
755	CALL disturb_field( 'u', tend, u )
756	CALL disturb_field( 'v', tend, v )
757	ELSEIF ( ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) &
758	.AND. .NOT. nest_domain ) THEN
759	!
760	!-- Runs with a non-cyclic lateral wall need perturbations
761	!-- near the inflow throughout the whole simulation
762	dist_range = 1
763	CALL disturb_field( 'u', tend, u )
764	CALL disturb_field( 'v', tend, v )
765	dist_range = 0
766	ENDIF
767	time_disturb = time_disturb - dt_disturb
768	ENDIF
769	ENDIF
770
771	!
772	!-- Reduce the velocity divergence via the equation for perturbation
773	!-- pressure.
774	IF ( intermediate_timestep_count == 1 .OR. &
775	call_psolver_at_all_substeps ) THEN
776
777	IF ( vnest_init ) THEN
778	!
779	!-- Compute pressure in the CG, interpolate top boundary conditions
780	!-- to the FG and then compute pressure in the FG
781	IF ( coupling_mode == 'vnested_crse' ) CALL pres
782
783	CALL cpu_log( log_point(82), 'vnest_bc', 'start' )
784	CALL vnest_boundary_conds
785	CALL cpu_log( log_point(82), 'vnest_bc', 'stop' )
786
787	IF ( coupling_mode == 'vnested_fine' ) CALL pres
788
789	!-- Anterpolate TKE, satisfy Germano Identity
790	CALL cpu_log( log_point(83), 'vnest_anter_e', 'start' )
791	CALL vnest_anterpolate_e
792	CALL cpu_log( log_point(83), 'vnest_anter_e', 'stop' )
793
794	ELSE
795
796	CALL pres
797
798	ENDIF
799
800	ENDIF
801
802	!
803	!-- If required, compute liquid water content
804	IF ( cloud_physics ) THEN
805	CALL calc_liquid_water_content
806	ENDIF
807	!
808	!-- If required, compute virtual potential temperature
809	IF ( humidity ) THEN
810	CALL compute_vpt
811	ENDIF
812
813	!
814	!-- Compute the diffusion quantities
815	IF ( .NOT. constant_diffusion ) THEN
816
817	!
818	!-- Determine surface fluxes shf and qsws and surface values
819	!-- pt_surface and q_surface in dependence on data from external
820	!-- file LSF_DATA respectively
821	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
822	intermediate_timestep_count == intermediate_timestep_count_max )&
823	THEN
824	CALL ls_forcing_surf( simulated_time )
825	ENDIF
826
827	!
828	!-- First the vertical (and horizontal) fluxes in the surface
829	!-- (constant flux) layer are computed
830	IF ( constant_flux_layer ) THEN
831	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
832	CALL surface_layer_fluxes
833	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
834	ENDIF
835
836	!
837	!-- If required, solve the energy balance for the surface and run soil
838	!-- model. Call for horizontal as well as vertical surfaces
839	IF ( land_surface .AND. time_since_reference_point > skip_time_do_lsm) THEN
840
841	CALL cpu_log( log_point(54), 'land_surface', 'start' )
842	!
843	!-- Call for horizontal upward-facing surfaces
844	CALL lsm_energy_balance( .TRUE., -1 )
845	CALL lsm_soil_model( .TRUE., -1, .TRUE. )
846	!
847	!-- Call for northward-facing surfaces
848	CALL lsm_energy_balance( .FALSE., 0 )
849	CALL lsm_soil_model( .FALSE., 0, .TRUE. )
850	!
851	!-- Call for southward-facing surfaces
852	CALL lsm_energy_balance( .FALSE., 1 )
853	CALL lsm_soil_model( .FALSE., 1, .TRUE. )
854	!
855	!-- Call for eastward-facing surfaces
856	CALL lsm_energy_balance( .FALSE., 2 )
857	CALL lsm_soil_model( .FALSE., 2, .TRUE. )
858	!
859	!-- Call for westward-facing surfaces
860	CALL lsm_energy_balance( .FALSE., 3 )
861	CALL lsm_soil_model( .FALSE., 3, .TRUE. )
862
863	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
864	ENDIF
865
866	!
867	!-- If required, solve the energy balance for urban surfaces and run
868	!-- the material heat model
869	IF (urban_surface) THEN
870	CALL cpu_log( log_point(74), 'urban_surface', 'start' )
871	CALL usm_surface_energy_balance
872	IF ( usm_material_model ) THEN
873	CALL usm_material_heat_model
874	ENDIF
875	CALL cpu_log( log_point(74), 'urban_surface', 'stop' )
876	ENDIF
877
878	!
879	!-- Compute the diffusion coefficients
880	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
881	IF ( .NOT. humidity ) THEN
882	IF ( ocean ) THEN
883	CALL diffusivities( prho, prho_reference )
884	ELSE
885	CALL diffusivities( pt, pt_reference )
886	ENDIF
887	ELSE
888	CALL diffusivities( vpt, pt_reference )
889	ENDIF
890
891	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
892
893	ENDIF
894
895	!
896	!-- If required, calculate radiative fluxes and heating rates
897	IF ( radiation .AND. intermediate_timestep_count &
898	== intermediate_timestep_count_max .AND. time_since_reference_point > &
899	skip_time_do_radiation ) THEN
900
901	time_radiation = time_radiation + dt_3d
902
903	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
904	THEN
905
906	CALL cpu_log( log_point(50), 'radiation', 'start' )
907
908	IF ( .NOT. force_radiation_call ) THEN
909	time_radiation = time_radiation - dt_radiation
910	ENDIF
911
912	CALL radiation_control
913
914	CALL cpu_log( log_point(50), 'radiation', 'stop' )
915
916	IF (urban_surface) THEN
917	CALL cpu_log( log_point(75), 'usm_radiation', 'start' )
918	CALL usm_radiation
919	CALL cpu_log( log_point(75), 'usm_radiation', 'stop' )
920	ENDIF
921
922	ENDIF
923	ENDIF
924
925	ENDDO ! Intermediate step loop
926
927	!
928	!-- Increase simulation time and output times
929	nr_timesteps_this_run = nr_timesteps_this_run + 1
930	current_timestep_number = current_timestep_number + 1
931	simulated_time = simulated_time + dt_3d
932	simulated_time_chr = time_to_string( simulated_time )
933	time_since_reference_point = simulated_time - coupling_start_time
934
935
936
937	IF ( simulated_time >= skip_time_data_output_av ) THEN
938	time_do_av = time_do_av + dt_3d
939	ENDIF
940	IF ( simulated_time >= skip_time_do2d_xy ) THEN
941	time_do2d_xy = time_do2d_xy + dt_3d
942	ENDIF
943	IF ( simulated_time >= skip_time_do2d_xz ) THEN
944	time_do2d_xz = time_do2d_xz + dt_3d
945	ENDIF
946	IF ( simulated_time >= skip_time_do2d_yz ) THEN
947	time_do2d_yz = time_do2d_yz + dt_3d
948	ENDIF
949	IF ( simulated_time >= skip_time_do3d ) THEN
950	time_do3d = time_do3d + dt_3d
951	ENDIF
952	DO mid = 1, masks
953	IF ( simulated_time >= skip_time_domask(mid) ) THEN
954	time_domask(mid)= time_domask(mid) + dt_3d
955	ENDIF
956	ENDDO
957	time_dvrp = time_dvrp + dt_3d
958	IF ( simulated_time >= skip_time_dosp ) THEN
959	time_dosp = time_dosp + dt_3d
960	ENDIF
961	time_dots = time_dots + dt_3d
962	IF ( .NOT. first_call_lpm ) THEN
963	time_dopts = time_dopts + dt_3d
964	ENDIF
965	IF ( simulated_time >= skip_time_dopr ) THEN
966	time_dopr = time_dopr + dt_3d
967	ENDIF
968	time_dopr_listing = time_dopr_listing + dt_3d
969	time_run_control = time_run_control + dt_3d
970
971	!
972	!-- Data exchange between coupled models
973	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled &
974	.AND. .NOT. vnested ) THEN
975	time_coupling = time_coupling + dt_3d
976
977	!
978	!-- In case of model termination initiated by the local model
979	!-- (terminate_coupled > 0), the coupler must be skipped because it would
980	!-- cause an MPI intercomminucation hang.
981	!-- If necessary, the coupler will be called at the beginning of the
982	!-- next restart run.
983	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
984	CALL surface_coupler
985	time_coupling = time_coupling - dt_coupling
986	ENDDO
987	ENDIF
988
989	!
990	!-- Execute user-defined actions
991	CALL user_actions( 'after_integration' )
992
993	!
994	!-- If Galilei transformation is used, determine the distance that the
995	!-- model has moved so far
996	IF ( galilei_transformation ) THEN
997	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
998	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
999	ENDIF
1000
1001	!
1002	!-- Check, if restart is necessary (because cpu-time is expiring or
1003	!-- because it is forced by user) and set stop flag
1004	!-- This call is skipped if the remote model has already initiated a restart.
1005	IF ( .NOT. terminate_run ) CALL check_for_restart
1006
1007	!
1008	!-- Carry out statistical analysis and output at the requested output times.
1009	!-- The MOD function is used for calculating the output time counters (like
1010	!-- time_dopr) in order to regard a possible decrease of the output time
1011	!-- interval in case of restart runs
1012
1013	!
1014	!-- Set a flag indicating that so far no statistics have been created
1015	!-- for this time step
1016	flow_statistics_called = .FALSE.
1017
1018	!
1019	!-- If required, call flow_statistics for averaging in time
1020	IF ( averaging_interval_pr /= 0.0_wp .AND. &
1021	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
1022	simulated_time >= skip_time_dopr ) THEN
1023	time_dopr_av = time_dopr_av + dt_3d
1024	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
1025	do_sum = .TRUE.
1026	time_dopr_av = MOD( time_dopr_av, &
1027	MAX( dt_averaging_input_pr, dt_3d ) )
1028	ENDIF
1029	ENDIF
1030	IF ( do_sum ) CALL flow_statistics
1031
1032	!
1033	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
1034	IF ( averaging_interval /= 0.0_wp .AND. &
1035	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
1036	simulated_time >= skip_time_data_output_av ) &
1037	THEN
1038	time_do_sla = time_do_sla + dt_3d
1039	IF ( time_do_sla >= dt_averaging_input ) THEN
1040	CALL sum_up_3d_data
1041	average_count_3d = average_count_3d + 1
1042	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
1043	ENDIF
1044	ENDIF
1045
1046	!
1047	!-- Calculate spectra for time averaging
1048	IF ( averaging_interval_sp /= 0.0_wp .AND. &
1049	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
1050	simulated_time >= skip_time_dosp ) THEN
1051	time_dosp_av = time_dosp_av + dt_3d
1052	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
1053	CALL calc_spectra
1054	time_dosp_av = MOD( time_dosp_av, &
1055	MAX( dt_averaging_input_pr, dt_3d ) )
1056	ENDIF
1057	ENDIF
1058
1059	!
1060	!-- Call flight module and output data
1061	IF ( virtual_flight ) THEN
1062	CALL flight_measurement
1063	CALL data_output_flight
1064	ENDIF
1065
1066	!
1067	!-- Profile output (ASCII) on file
1068	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1069	CALL print_1d
1070	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1071	dt_3d ) )
1072	ENDIF
1073
1074	!
1075	!-- Graphic output for PROFIL
1076	IF ( time_dopr >= dt_dopr ) THEN
1077	IF ( dopr_n /= 0 ) CALL data_output_profiles
1078	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1079	time_dopr_av = 0.0_wp ! due to averaging (see above)
1080	ENDIF
1081
1082	!
1083	!-- Graphic output for time series
1084	IF ( time_dots >= dt_dots ) THEN
1085	CALL data_output_tseries
1086	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1087	ENDIF
1088
1089	!
1090	!-- Output of spectra (formatted for use with PROFIL), in case of no
1091	!-- time averaging, spectra has to be calculated before
1092	IF ( time_dosp >= dt_dosp ) THEN
1093	IF ( average_count_sp == 0 ) CALL calc_spectra
1094	CALL data_output_spectra
1095	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1096	ENDIF
1097
1098	!
1099	!-- 2d-data output (cross-sections)
1100	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1101	CALL data_output_2d( 'xy', 0 )
1102	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1103	ENDIF
1104	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1105	CALL data_output_2d( 'xz', 0 )
1106	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1107	ENDIF
1108	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1109	CALL data_output_2d( 'yz', 0 )
1110	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1111	ENDIF
1112
1113	!
1114	!-- 3d-data output (volume data)
1115	IF ( time_do3d >= dt_do3d ) THEN
1116	CALL data_output_3d( 0 )
1117	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1118	ENDIF
1119
1120	!
1121	!-- Masked data output
1122	DO mid = 1, masks
1123	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1124	CALL data_output_mask( 0 )
1125	time_domask(mid) = MOD( time_domask(mid), &
1126	MAX( dt_domask(mid), dt_3d ) )
1127	ENDIF
1128	ENDDO
1129
1130	!
1131	!-- Output of time-averaged 2d/3d/masked data
1132	IF ( time_do_av >= dt_data_output_av ) THEN
1133	CALL average_3d_data
1134	CALL data_output_2d( 'xy', 1 )
1135	CALL data_output_2d( 'xz', 1 )
1136	CALL data_output_2d( 'yz', 1 )
1137	CALL data_output_3d( 1 )
1138	DO mid = 1, masks
1139	CALL data_output_mask( 1 )
1140	ENDDO
1141	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1142	ENDIF
1143
1144	!
1145	!-- Output of particle time series
1146	IF ( particle_advection ) THEN
1147	IF ( time_dopts >= dt_dopts .OR. &
1148	( simulated_time >= particle_advection_start .AND. &
1149	first_call_lpm ) ) THEN
1150	CALL data_output_ptseries
1151	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1152	ENDIF
1153	ENDIF
1154
1155	!
1156	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1157	#if defined( __dvrp_graphics )
1158	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1159	#endif
1160	IF ( time_dvrp >= dt_dvrp ) THEN
1161	CALL data_output_dvrp
1162	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1163	ENDIF
1164	#if defined( __dvrp_graphics )
1165	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1166	#endif
1167
1168	!
1169	!-- If required, set the heat flux for the next time step at a random value
1170	IF ( constant_heatflux .AND. random_heatflux ) THEN
1171	IF ( surf_def_h(0)%ns >= 1 ) CALL disturb_heatflux( surf_def_h(0) )
1172	IF ( surf_lsm_h%ns >= 1 ) CALL disturb_heatflux( surf_lsm_h )
1173	IF ( surf_usm_h%ns >= 1 ) CALL disturb_heatflux( surf_usm_h )
1174	ENDIF
1175
1176	!
1177	!-- Execute user-defined actions
1178	CALL user_actions( 'after_timestep' )
1179
1180	!
1181	!-- Determine size of next time step. Save timestep dt_3d because it is
1182	!-- newly calculated in routine timestep, but required further below for
1183	!-- steering the run control output interval
1184	dt_3d_old = dt_3d
1185	CALL timestep
1186
1187	!
1188	!-- Synchronize the timestep in case of nested run.
1189	IF ( nested_run ) THEN
1190	!
1191	!-- Synchronize by unifying the time step.
1192	!-- Global minimum of all time-steps is used for all.
1193	CALL pmci_synchronize
1194	ENDIF
1195
1196	!
1197	!-- Computation and output of run control parameters.
1198	!-- This is also done whenever perturbations have been imposed
1199	IF ( time_run_control >= dt_run_control .OR. &
1200	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1201	THEN
1202	CALL run_control
1203	IF ( time_run_control >= dt_run_control ) THEN
1204	time_run_control = MOD( time_run_control, &
1205	MAX( dt_run_control, dt_3d_old ) )
1206	ENDIF
1207	ENDIF
1208
1209	!
1210	!-- Output elapsed simulated time in form of a progress bar on stdout
1211	IF ( myid == 0 ) CALL output_progress_bar
1212
1213	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1214
1215
1216	ENDDO ! time loop
1217
1218	!-- Vertical nesting: Deallocate variables initialized for vertical nesting
1219	IF ( vnest_init ) CALL vnest_deallocate
1220
1221	IF ( myid == 0 ) CALL finish_progress_bar
1222
1223	#if defined( __dvrp_graphics )
1224	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1225	#endif
1226
1227	CALL location_message( 'finished time-stepping', .TRUE. )
1228
1229	END SUBROUTINE time_integration

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